GT5S / GT Fuel Injection differences

yeti · 26-12-14, 06:46 PM

On closer examination, the 2144cc K-Jet engine in my Coupe is tired in a big way. I've been offered a carbed engine out of a GT5S, is there much difference between the short engines or is it just the manifold?

20vcqdriver · 26-12-14, 08:02 PM

Carbed engine is normally a 1921cc, there was a carbed 2144cc in the audi 100 of the day if memory serves me correctly. Ifyour car is already fuel injected though, best to keep it that way as quite a few differences including the fuel tank.....

yeti · 27-12-14, 12:39 PM

Ahaaaa, cheers for that. The plan was to put the injection onto the carbed short engine, but if it's a 1921cc, I'll bin the whole idea off.

Isimmo · 27-12-14, 12:58 PM

From memory, the bore is 79.5 on the WN and 81 on the KE. The rest of the capacity increase is from the throw of the crank. (Stroke).

msh · 27-12-14, 09:15 PM

Quote:

Originally Posted by yeti

Ahaaaa, cheers for that. The plan was to put the injection onto the carbed short engine, but if it's a 1921cc, I'll bin the whole idea off.

Don't worry about displacement - if you want to use fuel injection, you would try to use bottom end only anyway - as there would be no place to fit injectors.

However, there's one interesting thing in that ancient 1.9 engine - I've heard that there's the most aggressive stock camshaft found on 5 pot engine - the only problem is that there's shims, not tappets, so head which receives that cam should have shims too.

PoloGaz · 20-01-15, 12:29 PM

Still got the 2.0L 5 cylinder engine here Steve.

26-12-14, 08:02 PM	#2
20vcqdriver 4 ring whore! Classic Audi Club Member Join Date: Dec 2007 Location: Wirral Posts: 3,910	Carbed engine is normally a 1921cc, there was a carbed 2144cc in the audi 100 of the day if memory serves me correctly. Ifyour car is already fuel injected though, best to keep it that way as quite a few differences including the fuel tank..... __________________ Coupe quattro 1986:-~450bhp + loooong list of mods! Audi A7 Bi-TDI SLine Black edition 2015 mapped to produce 600lb/ft torque! Audi S4 4.2 V8 cabriolet 2004:-

27-12-14, 12:39 PM	#3
yeti Senior Member Classic Audi Club Member Join Date: Oct 2009 Location: Derby Posts: 1,166	Ahaaaa, cheers for that. The plan was to put the injection onto the carbed short engine, but if it's a 1921cc, I'll bin the whole idea off. __________________ 1990 Coupe Quattro (WTF did I buy that for?) Half a 1983 Coupe FI (long term parts shelf) 2003 Cors-arrrgh More Polos that you'd ever believe No time, no money, all the wrong tools and a workshop that's too far away

27-12-14, 12:58 PM	#4
Isimmo Super Moderator Classic Audi Club Member Join Date: Jul 2007 Location: Sissix-by-the-sea Posts: 15,218	From memory, the bore is 79.5 on the WN and 81 on the KE. The rest of the capacity increase is from the throw of the crank. (Stroke). __________________ 1985 WR quattro, 1985 20vT RallyRep, 1993 MTM ABY S2 Avant. 2010 S3 Sportback.

20-01-15, 12:29 PM	#6
PoloGaz Grown up member Classic Audi Club Member Join Date: Aug 2012 Location: Manchester Posts: 362	Still got the 2.0L 5 cylinder engine here Steve.